1212202112112 has 60 divisors (see below), whose sum is σ = 3393731090880. Its totient is φ = 403918631424.

The previous prime is 1212202112101. The next prime is 1212202112113. The reversal of 1212202112112 is 2112112022121.

1212202112112 is a `hidden beast` number, since 1 + 21 + 220 + 211 + 211 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212202112113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1156473 + ... + 1939544.

It is an arithmetic number, because the mean of its divisors is an integer number (56562184848).

Almost surely, 2^{1212202112112} is an apocalyptic number.

1212202112112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212202112112 is an abundant number, since it is smaller than the sum of its proper divisors (2181528978768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212202112112 is a wasteful number, since it uses less digits than its factorization.

1212202112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098750 (or 3098741 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212202112112 its reverse (2112112022121), we get a palindrome (3324314134233).

The spelling of 1212202112112 in words is "one trillion, two hundred twelve billion, two hundred two million, one hundred twelve thousand, one hundred twelve".